21221310333 has 8 divisors (see below), whose sum is σ = 28367820000. Its totient is φ = 14111170448.

The previous prime is 21221310259. The next prime is 21221310337. The reversal of 21221310333 is 33301312212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21221310333 - 2¹⁰ = 21221309309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221310337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9091083 + ... + 9093416.

It is an arithmetic number, because the mean of its divisors is an integer number (3545977500).

Almost surely, 2^21221310333 is an apocalyptic number.

It is an amenable number.

21221310333 is a deficient number, since it is larger than the sum of its proper divisors (7146509667).

21221310333 is a wasteful number, since it uses less digits than its factorization.

21221310333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18184891.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21221310333 its reverse (33301312212), we get a palindrome (54522622545).

The spelling of 21221310333 in words is "twenty-one billion, two hundred twenty-one million, three hundred ten thousand, three hundred thirty-three".